1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ec334f0b9ffd40cf1fece9200308148c66401f944d35bbc5e2d465c188398. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9844e2a0-fa9f-4309-a09d-18ed1fdd7ba4.json and https://artists.proofprofile.net/proofs/artist/9844e2a0-fa9f-4309-a09d-18ed1fdd7ba4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a702d24d59aaf56c9a31bb8e28f46e391dad8cac6372d9ff771e928657c686. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652a7efe1e179882df6bf918231a7ad9f1e723419c21fa0894cfd87b650c4b03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c4c249c09dbf4fd8e31378cccd370969325c663761e080b30ed8670136cb4. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf945884e5d92597a493230636de0b37a4676c9750cb7fdca2e06908e830765f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d84ba66e5587ce10ab75c5df998882e74ec330bf05ffb306d3063aa66a6f6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da6a1107da7f172a822a1f5c40f152d4a7768d0b90292747200565467fd3868. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a43b22f6774220abc0b21e552f0d3d7b2a54157aec34bc99bdc9f9b9c073ad5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef27533acb4bd3572e8d31494699012e4afcbd945afad82f677cbd66ad80919c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37918a6071aba30f514c9afc552cf460d8a0c928992e4754d64b81c4c39a13e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6919c19c9469330dfe8cabf3a26a4e24840d840d80dc4921b27b18e7e737d3c5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561805235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e47506258758a0ffcff7f1c025c67358feb8ac8925e2900c593da5b14487c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d9a2b18a6f05a95bb12a86199e5f1d645d2452c1d4819ac1120289af89e453. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562004449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936c8985b1539dc498624c87caafa5326b49d4f236d9b8aef018fa7f7eb6340. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9620b591acfd3be4bf939fcd58172ec996237c2f12f3bdc8c61fdf23b8af2e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561805199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c4d256f8d1e890027805bfd9c2a1bb699e935396460ae8f9736d062bcd54a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779d0bff99774a52432d6409eb4db53908491d49fb712748eee06b94be9ef51. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e04b568a80fb30743ceaa2f9d95be30a85c60ee1209d7a31799e55213cb792. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562104509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b96183a87d3d40e25553b270d27e4c527cb2aeed0ad49027963c6c233d3c16. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561805161.